Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd44f5e50321ab60…

MALICIOUS

PDF

88.3 KB Created: 2021-06-30 23:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7ede2b3249efd81343b7b0f86c0a76c9 SHA-1: 8bc6ec2b0eb964a4e74e8429d0ab0709f58b1619 SHA-256: bd44f5e50321ab60146a92823345439de4f0449908a0b8b689fe7fa1270dd76e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous URLs pointing to PDF files hosted on compromised CMS sites. These links are likely designed to redirect users to malicious content or phishing pages, serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://kaushalacademy.org/ckfinder/userfiles/files/83015748414.pdf In PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/avtm6u03es15h17i7gie2g71qp/juziwevelege.pdfIn PDF document text
    • https://mszukam.pl/dat//file/zatevufarizugimokijagidoz.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/ranuriwopororu.pdfIn PDF document text
    • http://kookwarenhuis.nl/app/webroot/files/userfiles/files/woregulepaluderakajupo.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dce675216---lemotimekuwak.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/1b0da0a811fd815c30c77e3af78f1b1f/bukatep.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160716cdc8adfb---37179217993.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089af533e887---48913651471.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/fagik.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebb4431724---kizomik.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/8198156758.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210605051907.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/50080195584.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/1913616128.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/nuxapebatanejuz.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/35202389118cb2d640ee0b111a37d386/24583913875.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/39a2e4ccc6c06ccf7f55949b6dab6a7a/15910518471.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/87376438143.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/45a4733a5c13dbedbd00a18056a93b4c/28300060920.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/14bnqd2q56lp4e9jk5itlk4mkt/kiwemibeputofegimegebez.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c420707a6d0---bededavinerunikaxujajub.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9cf475278---webapokesezikevakesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=isosceles+triangle+that+is+not+equilateralPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_02_sfnt_off00010ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE0 10704 bytes
SHA-256: 4f5ac0d041d0fde99d217065c01dcfe9cf7939b037a0080b201677d842da0d6b
font_03_sfnt_off00012314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12314 18128 bytes
SHA-256: 2ba3d4f78b4576cd1456b5fc5c64deaf9d3549a2ea7822a39b54f40a30c3f35b

Open this report in the interactive analyzer, or submit your own file for analysis.